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  • .17 HMR upper

    Hey All,
    Anybody have a recommendation on a .17 HMR upper. A see Alexander Arms makes them, does anybody else know who mass produces them?
    I have a New Frontier lower to put it on, thought a .17 upper would be a good fit. Thanks.

  • #2
    Well Big Daddy as soon as I get mine I'll let you know. Placed the order today. I got a CMMG 22lr upper for my wife and works great. Just VERY Dirty ammo. Gritty as hell. after 200 rounds, pulled the bolt carrier and it seemed like I threw it in a sand box.

    Hopefully the 17HMR will be cleaner but either way, both are cheaper to get trigger time with than 556 and when you can find ammo for 556 too. Scarce these days.

    Comment


    • #3
      Tedward,
      Did your .17hmr from AA? I have a polymer New Frontier lower and AA told me they "didn't recommend" putting their upper on a polymer lower. They didn't give any explanation, maybe it's just so I'll but the whole rifle from them.
      Let me know how you like it once you get to shoot it.

      Comment


      • #4
        I haven't got mine yet, still on the list. Probably till May at this rate...

        As for polymer lowers, I have had many gun specialist, to me at least, most with over 20 years in the industry tell me to stay away from them. They have seen them fail at stress points like the buffer tube connection, trigger guards, take-down pins and mag wells. The one guy who has a business and does SBR engraving said he won't touch them in case they break he doesn't want to be responsible. He also said Forged are VERY Strong as they are molded and pressed into the cracks and curves with over 20,000 tons of pressure giving you flowing curving material. It also allows some flex under stressful times.

        He then told me the downfall to Billet. Billet is brittle/stiff and when formed it has a horizontal grain, picture like a tree grain. When they are cut, the grain is then thin in areas and can snap, like a like a piece of wood does. That is why good Billet Lowers have the trigger guard as part of the lower to support it from flexing and snapping. Also the area around the buffer tube is beefier to prevent flex and snap-age. I always just thought Billet was better but after hearing this, only if beefed up and continuous trigger guards. Also 7075 is stiffer than 6061 which has more ability to absorb flex. I will say I have a billet lower without he continuous trigger guard so hopefully its o.k. but will remember what he said in case I ever get fatigue related cracks. Just another thing to look at and make your own determination, but Polymer is out of my thoughts completely.

        Back to your question. A.A. 17HMR uses a block in the mag-well that also supports the extractor for the spent case. That may be where added stress comes into play. They are the experts so they probably have a good idea of the problem areas.

        I ordered one of there lowers for $100 back around 1/1/13 and still waiting. I have the trigger parts and will just put my lower together. I also can pick my grip and stock which will be a light weight ACE Skeleton Stock. It does save me about a hundred bucks putting it together but I don't end up with extra stocks and pieces I won't use in the future. So $700 for the upper, $100 for the lower, $60 for the lower parts kit $130 for the stock & buffer parts and $30 for the grip. Around the same as an entire gun from them but I can say I did it and know my gun inside and out.

        Anyhow, I'll let you know how it runs once I get it together so do some research on the lowers.

        Comment


        • #5
          Alexander Arms Sales Order/ 1 month

          I got my sales order yesterday, 2/25/13, for my 17HMR Upper I that I had placed the order on 1/30/13. I guess if it takes 25 days, 17 actual M-F working days, to open the e-mail and type in the information, even with parts being a month out, I suppose it will be June or July till I get my Upper.

          Just wanted to let you know they are getting the requests into the system but the actual delivery date to follow.

          Comment


          • #6
            Originally posted by BigDaddy View Post
            Tedward,
            Did your .17hmr from AA? I have a polymer New Frontier lower and AA told me they "didn't recommend" putting their upper on a polymer lower. They didn't give any explanation, maybe it's just so I'll but the whole rifle from them.
            Let me know how you like it once you get to shoot it.
            This makes no sense at all. The 5.56 is vastly high pressure with far more recoil and no ill effects on a poly lower? Aside from he fact the LOWER take a amazingly small amount of the stress of the ar design anyway.

            Comment


            • #7
              Originally posted by Maine04657 View Post
              This makes no sense at all. The 5.56 is vastly high pressure with far more recoil and no ill effects on a poly lower? Aside from he fact the LOWER take a amazingly small amount of the stress of the ar design anyway.
              A lot doesn't make sense in life but the 17HMR mechanically works different than the AR-15 Direct Impingement System (DIS). A DIS uses gas to push the bolt back and forth leaving the upper to take all of the brunt force. As I said before but am 100% sure, the extractor for the 17HMR occurs in the lower magazine block according to the website and pictures. The aluminum block that goes into the lower magazine area and has an extractor that moves mechanically with the bolt. This may put pressure on the mag-well but again, they are the experts and have done the research.

              Anyhow, I am just going with what they say and from what other people have said, stay away from the plastic for my AR's.

              Thuthfully if you really think about it, Glocks, Springfield XD's and S&W M&P's are made of a Polymer too or some kind of non metal material. So hard to tell.

              You can try it since a Polymer or Carbon Lower runs around $150 these days and if it breaks, just let us know and we can confirm the manufacture was right.

              Comment


              • #8
                Originally posted by Tedward View Post
                A lot doesn't make sense in life but the 17HMR mechanically works different than the AR-15 Direct Impingement System (DIS). A DIS uses gas to push the bolt back and forth leaving the upper to take all of the brunt force. As I said before but am 100% sure, the extractor for the 17HMR occurs in the lower magazine block according to the website and pictures. The aluminum block that goes into the lower magazine area and has an extractor that moves mechanically with the bolt. This may put pressure on the mag-well but again, they are the experts and have done the research.
                WHAT?? Ok lets look at this form a purely stress related standpoint the 17HMR does NOT produce enough recoil to damage the lower if the barrel was held ON the lowed and fired with the CASE pressing on the lower it woudl not hurt it. From the pictures I see on there site I do not see any way damage could occur. The BOLT and extractor to work must be inline with the barrel thus I do not see how these parts could be located in the lower?? The picture of the upper I see on there site shows the two MOUNTING lugs seen here ( http://www.shopalexanderarms.com/.17_HMR-Uppers.html ) these are how all uppers on ar's are attached. FYI it is a DI system not a DIS! Also ar's can also be piston driven. As for the operation I have upper in 22lr, 9mm, .40, .45 ,.204, 5.56, .223, 7.62, 50 wolf and several more most of the smaller calibers are is the 17 is a simple BLOW back this means much less stress on the lower as the di or piston rifle calibers are somewhat DELAYED thus putting more stresses on the gun.

                Comment


                • #9
                  Well i do agree with the part it is the least amount of recoil of any caliber. They may have a reason so just try and let us know if you have any issues. This picture shows the little lever in the magwell. Look at picture #3. This is the only thing I can think may have any affect. Either way just give it a shot

                  http://www.shopalexanderarms.com/Rif...ete_Rifle.html
                  Last edited by Tedward; 03-03-2013, 22:15. Reason: bad link

                  Comment


                  • #10
                    Originally posted by Tedward View Post
                    Well i do agree with the part it is the least amount of recoil of any caliber. They may have a reason so just try and let us know if you have any issues. This picture shows the little lever in the magwell. Look at picture #3. This is the only thing I can think may have any affect. Either way just give it a shot

                    http://www.shopalexanderarms.com/Rif...ete_Rifle.html
                    That is a magwell adapter the "thing" sticking up is the ejector. My 9mm and other pistol calibers also have one NO ( ZERO ) stress is relayed through this as it DOES NOT contact the upper. It rides in a SLOT cut out of the bolt. There is NO NONE ZERO ZILCH reason to even think a 17hrn could harm a poly lower.

                    Of course there is always one exception a KB. Given the history of the first semi 17MHR rifles my guess would be the reason for the "warning" is the KB would be far more likely to damage a poly them a metal lower though even in that most improbable scenario I would have no second thought about using a poly lower.

                    As stated I use a poly on a 5.56 the pressures recoil mass are at lest 5 to 10 times that of a 17hmr. I am always dubious about any "warning" sans a explanation when the warning is so dubious to anyone with the smallest amount of understanding of pressure and stress..

                    In short I call BS..

                    Comment


                    • #11
                      ok, let us know and we'll go with your opinion. I'll still use the good ol Billet or forged lower. Just not into polymer so each to there own.

                      Let us know when your arrives, I'll do the same. good luck

                      Comment


                      • #12
                        Originally posted by Tedward View Post
                        ok, let us know and we'll go with your opinion. I'll still use the good ol Billet or forged lower. Just not into polymer so each to there own.

                        Let us know when your arrives, I'll do the same. good luck
                        If they made on FA ready I might have one...

                        Comment


                        • #13
                          I have a factory AA 17HMR upper and have had my share of problems.. The stories I can tell you.. But I was able to get my 17 to cycle about 99% of the time on a stone stock DPMS lower.. It is fun to shoot, and for that reason I put up with the crap it sometimes dishes out..

                          The cycling isn't perfect, and any changes to "stand stock GI Lower" can cause cycling problems.. Even adjustable triggers will cause it not to reliably cycle..

                          My guess, and it is only a guess, is AA has never tested their upper on a poly lower and just don't want to say their upper will work.. And because of this they don't recommend their upper on a Poly lower.. It has nothing to do with worries if the poly lower "can take it"..

                          My guess, and again this is really a guess, if your poly lower uses stock hammer, hammer spring, and recoil spring, it will cycle fairly reliably.. Pay close attension to the mag well adapter and how it fits..

                          In closing, I love my 17.. It is a great shooter.. However I have accepted the occasional failure to load a round..

                          flk k

                          Comment


                          • #14
                            Thanks for your input. I also will deal with a 1% issue and have also ordered an AA lower and have a stock trigger. Nothing fancy, so if I get a few clambering issues, oh well. I get those on my 556, 22LR upper and some on my 223. Depends on the ammo, how many rounds and as i figure the best of everything, I can use what works best. I'm not in a gun battle so I think it is just the nature of a mechanical devise.

                            Glad to hear you have some good input and can't wait to get mine. I also have a Savage Bolt Action Bill Barrel, only 5 rounds, but love the performance and accuracy. Just want to be able to get more trigger time with the AR-platform for less $$ and something other than my 22LR. All are fun and when hunting comes into play, use the best ammo and have a clean well lubed rifle.

                            In my opinion too. Thanks for some actual owners opinions!

                            Comment


                            • #15
                              You will get plenty of trigger time with the little 17 HMR based AR.. Other than one of those Colt licensed Walthers 22 AR's my little .17 has had more rounds down it's tube than all of my other AR uppers..

                              And best of all.. No guilt when you don't pick up your brass <grin>..

                              Great out to 100 yards.. I have mine topped with a Leupold Vari X 3x9 Rimfire scope, and it is a little nail driver.. Murder on pest birds.. Anyway let us know how you like it when you get it..

                              flk k

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