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  1. Low profile gas blocks
  2. CMMG Bolt-on high Gasblock alignment with FF rail?
  3. How common is it for an upper not to fit a lower?
  4. Hi
  5. Free float rail installation with handguard cap?
  6. Daniel Defense owners who have installed a MOE pistol grip
  7. Source for .7556 low-pro gas blocks?
  8. Barrel movement?
  9. Lower Receiver End Plate Spring
  10. Sealant between carrier and key?
  11. Receiver nut torque.
  12. A2 with M4 ramps? can you machine them?
  13. Spikes M4LE issues with 223 ammo wtf
  14. Colt M4 Carbine 6920 front sight removal
  15. A2 Flash Hiders and Accuracy
  16. How hard is it to properly pin a compensator?
  17. Carry Handle help
  18. 5.56 barrel with larger caliber muzzle bevice
  19. BCM barrel length inconsistencies
  20. Changing from carbine to midlength question.
  21. Rail alignment
  22. Haha Oops.
  23. Magnesium AR lower
  24. BCM EAG tactical carbine cycling issues.
  25. Paint removal on lower
  26. What would cause this kind of compensator damage?
  27. Perfectly consistent malfunctions & extractor spring question
  28. Odd noise with bolt closed
  29. Skills To Build?
  30. Hate To Ask: Google Fu Fails Me
  31. Engraving / Etching / Printing onto a Polymer Lower
  32. Educate me on barrels please
  33. URXII (rifle) with Colt M4HB?
  34. Drop In 12.0 FSP Rails
  35. Muzzle device swap: what specific tools do you use?
  36. LMT LM8MRP slick handguard question
  37. X300U wont fit ar-15
  38. BCM gas port sizes?
  39. Issue resolved
  40. For those of you who Cerakoted, Gunkoted, etc.
  41. BCG comparison BCM vs Core15
  42. 14.5 barrel with a2 buffer tube/fixed stock
  43. Barrel worn out?
  44. New disintegrating AR bolt!
  45. Noveske Receiver Extension / Buffer Questions
  46. Quick question KAC SR-15 e3
  47. Compensator installation help...
  48. LMT MRP issues with timing AAC Brake.
  49. Barrel fowling and accuracy & accuracy testing WOW
  50. Winchester cases stuck in chamber of M16
  51. Legit Colt LPK?
  52. Need help diagnosing problem.. bad bolt?
  53. Police Trade In LWT Govt Carbine Hammer Pin Hole
  54. help with guide for cleaning rod
  55. Additional Vltor A5 Testing
  56. Buffer Size w/ Adjustable Gas Block
  57. Screwed the pooch on this one
  58. What have you lefty shooters done to your AR?
  59. bolt lock back...
  60. NSR barrel nut
  61. Shaved FSB/rail clearance
  62. Tight chamber in 7.62X39 upper
  63. Assembly feedback
  64. Extractor Lift
  65. Noveske switch block removal
  66. Extraction issue
  67. Who has broken a bolt with a mid-length gas system?
  68. Stag Bolts
  69. Need assistance with AR malfunction.
  70. Bolt/Headspace Question
  71. Gas Block Clearance
  72. Gas Key Staking
  73. Rifle Buffer Mods
  74. Geissele SMR mkIV Barrel Nut: Is this normal?
  75. Apex Square Shooter Compensator??
  76. BCG carrier key
  77. LMT piston bolt carrier "enhanced" cam pin track?
  78. Interesting issue with my KAC URX 3.1 build
  79. DD 16'' carbine gas port .055, options?
  80. What is a shoulder-less barrel?
  81. battlecomp owners what position do you install comp with emblem facing what position.
  82. Removing barrel assembling with pinned muzzle device?
  83. Colt barrel specs
  84. S&W enhanced flash hider - worth its size?
  85. LWRC M6SL handguard end cap
  86. J springs missing
  87. Weight of Hammer Forged vs Standard vs Standard (Light Weight) Barrels.
  88. Swapping different AR caliber uppers
  89. Help aligning YHM gas bock....
  90. What is the correct way to align this post?
  91. Failure to lock back after last round
  92. Brand New Ruger 556E failure UPDATE GREAT CUSTOMER SERV
  93. Mystery of the Broken FSB Taper Pin
  94. Issue zeroing new build
  95. GI Aluminium Specs
  96. Bolt Wear Issue . . .
  97. Identifying LMT lower parts
  98. Noveske NSR and SWS anti-rotation pin; Same Location?
  99. Unable to remove safety selector lever
  100. AAC...are you serious?
  101. Tight magazine well
  102. WTK: Is this KAC BUIS Defective?
  103. Hammer Forged Barrels
  104. POI shift of a front sight on a free float rail?
  105. BCM 14.5 middy with VLTOR A5 system. Suggestions?
  106. Stubborn barrel nut
  107. Severe gas leak
  108. Cam-pin wear as a contributor to bolt failure?
  109. DD Omega rail without delta pack/ring
  110. QD forever ruined
  111. Critical Failure - Seeking Advice
  112. Interesting fail today...
  113. Low profile ladder rail covers...need 'em!
  114. M&P15T Troy Rail removal
  115. SBR Kaboom!
  116. Magazine or feed ramp problem? (photo)
  117. Trying to understand buffers and springs
  118. Sadlak Industries LPGB oversized? Issues?
  119. A-5 buffer: Why is it smoother?
  120. Tightness in Fire Control area of lower
  121. MOE trigger guard help
  122. Bore treatment on a non-chromed barrel?
  123. Bolt Lug Tolerance/Spec
  124. Surefire Socom Muzzle Brake Tuning and Performance
  125. What is this buffer for?
  126. JP Adjustable Buttplate for PRS Stock
  127. new barrel, used bolt question
  128. What's the current state of DPMS rifles?
  129. NEA Compact Carbine Stock on non-SBR...?
  130. AAC 300 Blackout upper with HK MR556 lower problems.
  131. Chrome bolt Assembly vs standard etc
  132. Blown primers with Surefire Socom 556
  133. Oly is catching
  134. KAC owners, did you stake your castle nut?
  135. Flat Bottomed Free Float Forearms?
  136. Live cartridge stuck! .. Update! .. Page 4
  137. 10.5" Pistol upper issue
  138. Colt bolt assembly differences
  139. Barrel Nut Torque Question???
  140. Help me confirm an issue with my zero
  141. Colt LE69xx series lower forge codes
  142. Otis rail system.
  143. ALG FCG fires hammer 50% of time when trigger is released
  144. You filthy pig!! KX3
  145. Need an AR manual
  146. Geissele triggers and KNS ARP's
  147. Adams Arms/VLTOR A5 fail to eject
  148. First BCM upper build, possibly my last
  149. Unmarked AR BARREL ISSUES
  150. Piston gun gas rings
  151. upper troubles
  152. Spikes Tactical FN barrel steel is 21CrMoV511
  153. upper and lower fitting issues
  154. KAC SR-16 Pressure Reduction System
  155. Of bolts and coatings and cuts and tweaks...
  156. Horizontal POI Shift with ammo change, SR15 upper.
  157. LMT M4 GUARDIAN question
  158. Trigger group problem - solved
  159. Buffer Material Question
  160. Vltor MUR-1 extremely tight
  161. I can move to safe with the hammer uncocked. Why? - Resolved
  162. Strange Issues - BCM even baffled
  163. Odd jam...Any ideas?
  164. dumb mistake
  165. NSR 13.5 rail and BCM 16" upper. Something is crooked.
  166. Diagnosis check...bolt speed?
  167. Help w/ intermittent FTE/stovepipe issue
  168. Larue Rail Machining
  169. 16" intermediate gas port size
  170. Bolt catch out of spec?
  171. Reciprocating charging handles (RCH) vs non-reciprocating charging handles (NRCH)
  172. Info on ARPerformance 16" LW middy
  173. Crack or scratch?
  174. BCM Mk12 and Vltor A5 buffer
  175. Gas Block Screws
  176. Brand new SR15 Mod 1 problem
  177. How well can an AR run with broken extractor spring?
  178. Deactivating lower without destroying it.
  179. How reliable are Low Mass BCGs
  180. Adjustable Safety for Geissele
  181. Daniel Defense Clamp-On Gas Block
  182. Who can cut off and re-pin a muzzle device?
  183. Upper for SP1
  184. FSB tightness on a new barrel
  185. Cutting sight off of A2 gas block or new low profile gas block? Advice? Regrets?
  186. DD HIGH PRESURE TEST
  187. HK Mr556 + Geissele SSA = fail?
  188. Muzzle device install
  189. How to smooth out feed lips on AR mag?
  190. New build Short stroking issue diagnose
  191. What's up with the nitride processed barrels?
  192. Bolt catch roll pin problem
  193. Odd 10.5 SBR issues
  194. 6920 SOCOM at 1,000Yards.
  195. LMT Piston Rings and Other Questions
  196. KNS Anti-rotation w/ Geissele?
  197. Bushmaster Carbon 15 Ugh......
  198. Headspacing issues
  199. Carrier shift during dry-firing (and I'm assuming live fire also)
  200. KAC Micro 300m BUIS Question
  201. Extreme Cold Gas System Operation
  202. BCG binding in upper
  203. BCM midlength gas ports: 14.5" vs. 16"
  204. Sporadic FTF's
  205. Misfire central...Check out the dents on this brass
  206. Removing dimpled style castle nut off of SR15 (or how I destroyed the wrench)
  207. Do I need a new bolt?
  208. Help me diagnose this malfunction
  209. Bolt Carrier Question
  210. 16" Middy barrels with rifle feed ramps
  211. Grip screw torque value: creating a max specification?
  212. Will a shaved FSB fit under a Geissele MK IV?
  213. M-4 / Carbine Gas Port Modification
  214. Gas Tube Installation Problem
  215. Chrome lined barrel break in?
  216. Quick question about the Noveske Switchblock
  217. Vltor A5 parts needed for Colt 6920
  218. Giesselle SMR + Magpul Rail Pieces
  219. Pronged Flash Hider Question (Vortex vs. PWS Triad)
  220. Solution to short stroking?
  221. Polishing Hammer Face
  222. using a .750 gas block on a thinner barrel
  223. Understanding compensator nuances (observation of BC1.0 vs BCM)
  224. Gas tube too long?
  225. Magpul MBUS rear sight issues
  226. sight height info needed
  227. Deep scratches on new reciever
  228. Grip Screw seized up
  229. Short Stroking issues
  230. A2 Buffer tube,6 Position Buffer/Spring,& A Spacer
  231. Interesting Bushmaster gas port observation.
  232. 14.5 Middy with a A2 stock
  233. How does this happen?
  234. Upper to Lower Fit
  235. Best way to install barrel?
  236. Which Carbine Buffer for 18" Rifle-Length Gas System?
  237. Upper receiver crack
  238. Barrel extension canted?
  239. Gas block question
  240. Tuning Goals
  241. Carbine length gas with BCM comp
  242. Taper pins for low profile gas blocks
  243. Cerakote variance?
  244. I need help with a detent issue. Hit a road block.
  245. BNIB KAC SR15E3 MOD1 double feed issue
  246. BCG gets stuck real bad...
  247. Adjustable Gas Blocks for 5.56?
  248. installing Troy Battlerail on a Rock River Arms Elite Operator 2
  249. LPGB set screw distance
  250. Any experience with Brownell's line of nitrided SS barrels?