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View Full Version : AR Technical Discussion



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  1. handguards
  2. A.R.M.S. 40 Stand Alone Sight ?
  3. Height comparison of DD omega and Troy trx standard
  4. 2 quick lower build ?'s
  5. Barrel Break In?
  6. LMT BCG
  7. Cav Arms C8 Handguards Won't Fit
  8. Wolf too weak or Buffer too heavy?
  9. feeding problem
  10. dd mk18 rail trying to understand m203 or no
  11. problems after cleaning
  12. Roll-Pin punch support.
  13. Removing Noveske SWS Rail
  14. Best way to remove rockset brake????
  15. CMMG Clamp On Piston System?
  16. Bravo Standard or BFH or Spike's?
  17. MRP CQB 16" SS
  18. Need advice re: severe malfunction today
  19. Which lo-pro gas block?
  20. DD Lite vs. URX?
  21. offset rear sight
  22. DD Lite Rail 12 FSP
  23. BCM 11.5" Middy
  24. Remove roll pin on bolt release?
  25. Surplus Ammo & Arms Lower
  26. Buffer question
  27. ADAMS ARMS SHORT STROKING
  28. Barrel help.
  29. LMT MRP piston minor problem
  30. need some knowledge.....
  31. Converting S&W M&P15A to a top tier gun?
  32. Shave FSB or replace?
  33. possible upper issue???
  34. rails rails rails
  35. Colt Ar-15 A-3 Tactical Carbine Question
  36. Colt 6400C barrel rust-help!
  37. New 14.5" CHF barrel problems?
  38. BBL install problem, again
  39. failure to load
  40. Noveske trigger problem...
  41. Rifle gas tube
  42. Scored or machining marks on the chamber face. Help !
  43. Help on securing roll pins in stock
  44. Mistake on my part (Centurion Chamber)
  45. KNS pins to long?
  46. Firing pin leaves dimple on primer...
  47. Safety Selector
  48. CMMG Lowers
  49. AR-15 Buffer Test - High Speed Video
  50. Compilation of Threads on Picking a Lower
  51. yet another mk12 upper question:
  52. Does anyone know of a video which disproves the gas ring alignment myth?
  53. Bolt Group Upgrade Parts, AR6520 - Same as LE6920 ?
  54. Stovepiping jam on AR15
  55. A couple buffer spring, and buffer questions:
  56. rail system
  57. KAC RAS Rail Cover Installation
  58. Live round stuck in chamber!
  59. Question about BCM mid length gas port size
  60. Fail Zero with extractor upgrade
  61. Is my VTAC TRX Extreme over tightened?
  62. Chopping and BCM Mid Length?
  63. Is there any advantage to getting a hammer-forged barrel?
  64. Free Floating
  65. Why is the 14.5 Mid better than 16 Mid?
  66. Magazine Catch issues
  67. Final Report = "Fire To Destruction Test of U.S. M4A1 Carbine & M16A2 Rife Barrel(s)"
  68. How to refinish an old buttstock?
  69. Is my UBR defective?
  70. UBR storage screws: in or out?
  71. Removing FSB sling swivel
  72. Spikes Tactical 5.56 muzzle break
  73. Stainless Steel, Rust and Steel Wool
  74. swapping bolt carrier groups/spare parts
  75. Question about BCM BFH barrels
  76. M34 Tactical ARMT (Assault Rifle Multi-Tool)
  77. Changing buffers=changing zero?
  78. Troy TRX Extreme 9"
  79. Round top hammer "fit" problem
  80. No "O" ring for middy?
  81. ASAP and tightening castle nut
  82. Buffer change with new upper?
  83. Please educate me on the Vltor CASV-EL Rail
  84. There is something wrong with my ammo
  85. Keyholing at 25 yards
  86. Vortex on BCM 14.5
  87. Hard extraction with CMMG 11.5" upper
  88. changing barrels on a KAC SR-15E3.
  89. Noise sensitive shooter, quietest non-supressor muzzle devices?
  90. How much do buffer weights affect cyclic rate?
  91. What buffer to use with UBR - 18 inch barrel
  92. Headspacing, Bolt Matching and Barrel Extension Questions
  93. Adjusting VLTOR stock travel
  94. Headspace gauges
  95. ARMS 71 polymer sights
  96. Cant find an 16' SP1 upper - HELP
  97. Better Than Tinker Toys! Turning a VLTOR MUR Into a "DMR"
  98. Smith & Wesson M&P15TS - First Look - Updated 5/7/11
  99. Colt Upgrade Trigger Kit - SPK94774
  100. Proper Rail Install
  101. Do Mil-Spec and Commercial Buffer tubes have the same rate of thread?
  102. Techie Question
  103. Parts
  104. Colt 6400C barrel threading
  105. Pinned Gas Block Question
  106. DDM4 Upper meets Bushy lower.
  107. DDM4 selector issue
  108. How to tell if a PMAG will drop free or not
  109. Tac Sol AR-22 LT Hogue Handguard Removal?
  110. Front sight & flash hider
  111. I messed up a Colt 14.5" barrel while drilling it for an extended FH
  112. How do pin your castle nut with a MP ASAP Plate?
  113. Bushmaster barrel issue?
  114. Gas blocks: like metals?
  115. Rails for fat gas block
  116. Are these gas rings done?
  117. Help installing Vltor Modstock
  118. Weapon fires during trigger re-set while dry firing.
  119. Will KAC M5 RAS Rail fit Colt Heavy Barrel Upper?
  120. aperature diameter question between rear buis
  121. Help removing RRA pistol buffer tube w/ loctite
  122. Using an M4 upper for an A3 build...issues?
  123. Wilson Combat TTU trigger info ?
  124. Bushmaster XM15 E2S 25k vs others, reliability/durability
  125. trade out carbine for mid length barrel
  126. Fixed Carbine Stock Extensions
  127. Mil-Spec receiver extension tube
  128. grip screw threads??
  129. I can not get my KAC M5 rail on...period.
  130. DD Lite 12 FSP + pinned sight block?
  131. Adams Arms build question
  132. BCM 14.5 middy 12" rails & AAC MITER?
  133. Bolt Carriers?
  134. 1:7 v. 1:9 for 55gr/75 gr
  135. I need somebody to talk me through a spring swap on a Timney trigger and KNS AWPs ...
  136. DD FF Rail Differences?
  137. Name & Use Of This Part Of Bolt?
  138. Who's writing for PS Magazine???
  139. M16 A1 barrel 1 in 12 twist
  140. Accuracy Evaluation of Six Different Noveske Barrels
  141. rra vs dd
  142. Couple of Carry Handle Questions
  143. Barrel nut removal help - Lightweight barrel will not stop rotating in vice jaws
  144. permanently attaching a muzzle brake
  145. My review of a new BCM 14.5 Middy
  146. Does this Safety Fail?
  147. Accuracy Potential; BCM SS410 vs. BCM BFH
  148. Pins walking
  149. Broken Colt bolt, and what to look for...
  150. What are the risks of using a cheap LPK?
  151. Troglodyte Maintenance for the AR-15/M-16
  152. Uniformity of Chrome Lining?
  153. loose fitting CTR
  154. How to blacken laser engraving?
  155. Admitting Defeat...
  156. Need to find lower parts, but don't need a whole kit
  157. Creating a Middie 14.5 Barrel?
  158. Second shot failure
  159. Softer recoil impulse.
  160. Daniel Defense M4 rail removal
  161. What really fails on the AR?
  162. which comp/flash hider: battlecomp or pws fsc556
  163. QD sling swivel mount
  164. Acceptable front post height: poll added 09.09.10
  165. Manufacturers Using Delrin
  166. Titanium M4 Parts
  167. Recommend middie BBL. for next AR
  168. What are some possible causes of these failures?
  169. Trouble with new upper.
  170. Carrier Key gas leak
  171. Aero lower w/ Geissele SSA hammer not dropping freely
  172. BCM 14.5 mid length question.
  173. Remove/Replace flash hider. New crush washer?
  174. H&K MR556
  175. Instal help on Battle Comp 1.0
  176. anybody use Lother Walther barrels yet ?
  177. Muzzle Device Experimentation Method
  178. Need to turn a barrel down---how far?
  179. Prep for pinning a gas block
  180. The new barrel paradigm....GP LW CHF / P MW SS
  181. Concerns about bare aluminum inside upper receiver
  182. A2 stock on carbine?
  183. DEZ Arms Barrels- Are They Good?
  184. Rifle with carbine stock
  185. Anyone have a Troy M4 OEM QD plate?
  186. Handguard picatinny rail screw size and thread
  187. AR-Restor
  188. Gas ring issue***updated
  189. A1? Upper to Flattop
  190. Daniel Defense Lite Rail Handguard Installed
  191. Stuck cases, popped primers, and a ruined bolt.
  192. Bulged Barrel on LMT 10.5"
  193. AR parts replacement
  194. BCG head space ?
  195. Sprinco CS Buffer Springs
  196. taking flash sup off 12.5" w/ 11" rail?
  197. found a bur in my barrel. What do I do?
  198. Recountouring / fluting a barrel : Stainless vs CMV/Chrome Moly
  199. Gas ring question..
  200. Barrel harmonics
  201. Question BattleComp vs KAC TripleTap
  202. Wilson Combat TTU follow up.
  203. Convert Colt M4 to middy
  204. Question on barrel profiles
  205. LMT MRP piston Cam Pin Wear? - Pics
  206. Loose Barrel Nut
  207. How did I do? First time staking an endplate and it was an ASAP
  208. Charging handles
  209. Question about the pull on Geissele competition trigger.
  210. Magpul BAD Lever "Mod"
  211. SBR LMT Gas Block Question
  212. Why not permanently attach a Flash Hider w/ +1,100 degree silver solder?
  213. Durability of Timney triggers
  214. Free float handguards vrs. Drop in two peace hand guards
  215. Do I need to pin the gas block
  216. Why do Noveske barrels already have the gas block installed?
  217. Need Armorer...
  218. Lightweight FF tubes with no rail covers. Hot??
  219. How the heck did this happen?
  220. LMT MRP Conversion Question
  221. Bolt not locking back... need your help!
  222. Quick question on removing FSB
  223. locking lug integrity differences between m4/m16
  224. BCM Barrels
  225. changing collapsible stock
  226. Heavier spring or heavier buffer: which is better?
  227. moe hg top rail?
  228. Need 2-stage Match trigger for Colt size FCG
  229. Which Chrome bolt/carrier for a DMR rig?
  230. Another Best Buffer Question
  231. M4 Questions?
  232. GAS PORT DIMENSIONS
  233. Gas port erosion?
  234. Another bolt not held open malf
  235. Noveske Rails for Switchblock ???
  236. Govt profile dimensions
  237. Best buffer - 16" middy?
  238. Best way to clock a compensator?
  239. Is there a chart for which buffer to use?
  240. gas tube roll pin too small???
  241. Just fought an hour-long, pitched battle with...
  242. Handguards for a Colt Commando
  243. Canted Carry Handle Sight
  244. ArmaLite 20" Barrel outer profile
  245. Question about small pin lower receivers?
  246. Finish Touchup
  247. Stiff buffer spring?
  248. Troy front buis
  249. LWRC LPK - anyone?
  250. Best buffer and spring for wife's lightweight build?