![]() I have also thought about cutting a few coils off the standard buffer spring to see if this helps. I need to find a reduced spring that I can try. I am leaning towards playing with the buffer spring and/or buffer. The idea of changing out the bolt carrier and gas block and such is not an option. So, my solution needs to be simple and easily available to all shooters. What are some options I can do to help aid the cycling? My goal is to have a subsonic round to sell to any and all shooters who have an AR-15 with 16" barrel and a 1:8" or 1:7" twist barrel shooting suppressed. When I get my speed up just above 1100 fps (supersonic speed), it will cycle and the bolt will lock back on an empty mag. With about 20 less spring tension than standard buffer springs, this RTB exclusive lets you tune the gas block way down to almost eliminate any recoil. It will eject the spent case, but the bolt will not lock back on an empty magazine. When I get down to the speed I need, I can not get the bolt carrier to fully cycle the next round. Identical in form, fit and function to our model RB5000, but with springs and damping optimized for use with light loads, including subsonic ammunition. Specially-engineered spring is designed to. I have a working subsonic load with both bullets in a standard M4 type, 16" barrel shooting suppressed. We do not recommend the Super 42 with 300 Blackout subsonic ammunition. BLUE Spring : ENHANCED Power Buffer Spring, Offers improved performance with. I am working with some custom 87 grain and 94 grain flat base, HP bullets that will stabilize in a 1:8" or 1:7" twist, 16" barrel. AR-15 Buffer Springs Armaspec Stealth Recoil Spring SRS-H2, - ARM153-H2 PSA AR15 Mil-Spec Carbine Buffer Spring - 410 PSA AR15 Rifle Action Spring - 7279. I began working on my 223 subs that will cycle an AR. I need some help guys! I know ammo very well, but I don't know the inner workings of an AR as well, like some of you do.
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