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View Full Version : AR Technical Discussion



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  1. Trigger and Hammer Pin Holes
  2. Flash hider spun at the range
  3. Can I shoot 5.56mm out of a .223 Wylde Chamber?
  4. Rock River Arms LPK???
  5. xcr/acr style bolt release on AR15 family...
  6. LMT MRP gas port sizes (5.56)?
  7. Charging handles?
  8. Will a side sling adapter fit a 6940?
  9. AR Problems :( please help!
  10. Brass Dings from hitting deflector
  11. Out of Spec Safety Selector
  12. Interesting Malfunction - Primer inside BCG
  13. Have heavy buffers fully mitigated issues associated with carbine gas systems?
  14. Geissele Automatics SSA
  15. Troy rail forearm question..........
  16. Rifle length gas and carbine buffer system
  17. Cavalry Arms lower?
  18. Moving UBR QD Cups
  19. Question reguarding LMT sopmod buttstocks VS CTX magpul locking buttstocks ...
  20. Wilson Combat extended bolt release?
  21. Buffer Tube install
  22. Colt 6940 vs Vltor VIS rail comparison?
  23. Do charging handles break?
  24. I know this has been asked...
  25. Question on Larue Stealth Upper Receivers
  26. took off a permanently attached comp. messed it up.
  27. Is there any color that is not cool to paint an AR?
  28. Measuring Headspace
  29. AR-10 Tools
  30. Lower Forgings Question
  31. Receiver Pins and new AR
  32. LMT triggers - standard vs. 2stage?
  33. Scope being blocked by FSB
  34. Troy MRF-CX rail
  35. RDS Zero for Entry Guns??
  36. Trigger pull woes
  37. Noveske KX3
  38. advice on removing flash hider from Ruger sr-556
  39. Cutting 18" barrel to 16," need to open up gas port?
  40. Help Finding Tech Thread
  41. Putting a black/deep blue finish on steel
  42. double fire
  43. Noveske Switchblock??
  44. Have you verified your zero at distance(s)?
  45. FSB cant problem
  46. LMT FSB pin falling out?
  47. Barrel coating options?
  48. Ejection
  49. 14.5" Barrel Identification
  50. hammer question
  51. Castle Nut Wrench
  52. Noveske N4 cut down to 12.5"?
  53. Two quick questions on Redi-Mod..
  54. Gas Key ?
  55. Yankee Hill on the Comaprison chart?
  56. PErmanent co-witness advantage?
  57. Swapping commercial extension for a milspec one. Worth the effort?
  58. KAC 600m micrometer sight
  59. Ionic action between barrel nut and receiver?
  60. Dye color change - Tangodown grip and panels
  61. Who here is using a Bill Springfield Trigger?
  62. Barrel threading tool(s)?
  63. Roll pin punch and holder sizes question
  64. RRA 2 stage trig weight
  65. 6.8 FTF Help
  66. Fail to pick up a round?
  67. woa spr barrels
  68. can someone tell me the weight of a stock front sight?
  69. CHF bbls vs. Std CL'd.
  70. JP rifles super bolt
  71. BCM barrel dimple
  72. Barrel Instillation
  73. Are new LMT Carrier Keys MIM?
  74. Function of gas block
  75. Why does carrier go back ?
  76. Replacing Rock River Set Screw Gas Block?
  77. Advice on removing a staked castle nut please...
  78. Gas Rings
  79. Lighten the Hammer?
  80. Colt 24 inch HBAR 1/9 twist???
  81. Rear take down pin loose
  82. Difficulty with Manual Extraction of Live Cartridge (UPDATED with Range Report)
  83. Disconnector Spring Installation
  84. Disconnector travel
  85. A2 Stock + Carbine Barrel = How To Buffer
  86. Help needed with short stroking new upper
  87. Lower Receiver Comparisons
  88. Improperly cut chamber? (Update - Range Report)
  89. Too Little Headspace?
  90. spray painting accessories
  91. Milled Receivers
  92. Daniel Defense A1.5 Rear Sight
  93. Gas Key Issue
  94. 12.5 Noveske & Switchblock Pinned Gas Bock
  95. "Best" Ambi Safety?
  96. Geissele SSA trigger for precision build?
  97. H1 Buffer fabrication
  98. Anyone convert 9mm upper receiver to 5.56mm? Why is gas tube hole a cloverleaf shape?
  99. Receiver Extension Interior Lining
  100. KX3 and barrel length questions.
  101. Any clamp style gas blocks you can stake?
  102. MRP sling mounts anti-rotation?
  103. Integrated Gas Keys/Monolithic Bolt Carriers
  104. Quality Scale and Torque Wrench Recommendations...
  105. Polymer Magazine Deet Test
  106. Mounting gas block with sealer?
  107. Levang linear compensator
  108. Noveske KX3
  109. Troy TRX Standard Rail Specs
  110. KG Gun Kote
  111. JARD 4.5 vs. RRA NM 2 Stage ?
  112. Look at what I've got - VTAC Multitasker
  113. Question About Grip/Trigger Guard Replacement
  114. Newb B.A.D question.
  115. Comparison of gas piston ARs?
  116. Which Manufacturer
  117. Barrel coating/painting
  118. Enidine Hydraulic Buffer for M4?
  119. ArmaLite U15A4CB Midlength upper?
  120. Which AR do you use the most?
  121. Wanting to rebarrel my LMT 5.56 with WOA 6.8spc/bolt
  122. Bolt Catch Problem
  123. gas block and LT handguards
  124. Sarco AR-15A1 Barrell
  125. seeking USGI hammer and trigger blueprint
  126. OK to dry fire an AR?
  127. Folding vs. Fixed BUIS
  128. Bolt carrier and Ar-15 accuracy
  129. B.A.D. to Worse
  130. KAC BUIS
  131. Gas port erosion & pistons?
  132. What gas system on a Bushmaster
  133. Oh noes! Pmag won't drop free.. I fixed it.
  134. Nitride Treated Barrels?
  135. I think I broke it...
  136. M4 barrels
  137. WHY THE BOLT DOESNT STAY LOCK BACK WITH AN EMPTY MAG??
  138. mp15 flat top
  139. Forward assist not working
  140. Barrel Hard Coating Thread
  141. YHM Handguards
  142. Reciever End Plate question
  143. disconnector function check
  144. FSC 556 on 6920???
  145. Long Extended Selector Switch?
  146. Buffer weight on "C7"
  147. Weight of FSB?
  148. lower receiver pin locations
  149. AR armorer/gunsmith?
  150. Please help explain "Stacking"
  151. steel magazine release button?
  152. M4 barrel nut torque specs?
  153. LaRue BUIS Removal
  154. question about bolts and piston guns?
  155. Help re old A1 stocks and receiver extensions?
  156. What singel stage trigger ?
  157. Spongy Selector
  158. kac rail not square
  159. Upper Reciever Wear
  160. Barrel reaming/extension alignment, extractor shearing, Stag warranty
  161. Strange malfunction - Possible extractor/ammunition issues?
  162. upper reciever wear
  163. MOE grip basic cap screwdriver tip(s?)
  164. Covering scratches on the receiver?
  165. Carrier key torque and staking?
  166. F-Marked FSB
  167. LMT BCG quality
  168. Receiver w/o M4 cuts + m4 extension
  169. Anodizing colors
  170. PINGGGG!
  171. RRA Entry Tactical Inspection - 09/09
  172. Need Rail help
  173. Troy extreme/VTAC extreme rail?
  174. 20rnd P-Mag FTF?
  175. Ambi Safety Switch
  176. AR experts
  177. Recomendations for castle nut wrench and ASAP
  178. How do folks know what mil-spec is . . .
  179. LMT MRP build. Tech quesions
  180. What might put a nick in the bolt face?
  181. With the availability of quality SS barrels (BCM SS410, Noveske, etc)...
  182. Noise from flash hiders
  183. Safety Install Help
  184. CMT bolts MPI tested ?
  185. shortening buffer tube
  186. combo Gas block / folding front sight Q
  187. Discoloration in Uppers when cleaning
  188. Is the rear pin hole in upper receiver . . .
  189. S.A.W. reliabilty package ?
  190. Adjustable Gas Block with TRX Extreme
  191. How is a KAC URX handguard installed?
  192. triangular handguard cap ? universal?
  193. POF Trigger Pin Size
  194. Durability of charging handle latch and upper receiver
  195. S&W 5.45 upper issues *resolved - user error*
  196. BCM uppers...loose fit?
  197. NIC industries Cerakote
  198. Hammer forging and barrel servic life
  199. The Delta Ring. Who Needs It?
  200. DD Lite installation... Stock Wrench?
  201. Question about DD Hammer Forged Barrels
  202. barrel extension: chrome, stainless or "white"?
  203. RRA Ambi-Safety GTG?
  204. Does the Redi-Mag work with Ambi Mag Releases?
  205. Consensus on most reliable AR mags?
  206. Brownell's 16" barrel
  207. What do you call this gadget?
  208. Free float vs non free float hand guard
  209. Noveske Barrel and Daniel Defense Rail
  210. Part Weights
  211. KAC trigger, light primer strikes
  212. cleaning the AR15
  213. Question: Tight Fit With An LMT MRP Piston Upper
  214. Barrel Modifacation?
  215. Strength of Ace M4-7 compared to milspec receiver extension
  216. UBR vs. Emod weight
  217. SPR build: solid or telestock
  218. Staked BCG with Hammer and Punch new bcg pics added
  219. 16" Stainless Barrel Recommendations
  220. Have you ever had/witnessed a receiver extension failure?
  221. Problem after cleaning....
  222. Low profile gas blocks and free float rails
  223. Effective, lightweight, muzzle brake to turn 14.5" to 16"
  224. Reciprocating mass and the recoil impulse
  225. Carbine or H Buffer for Mid length?
  226. MilTec1 lube........
  227. Handguard cap and omega rail
  228. Delaware Machinery lowers
  229. Which Barrel Length for Ballistics?
  230. Which buffer for full-length gas system?
  231. Question about gas system length and rails
  232. Removal of VLTOR Modstock?
  233. TD Stubbie Wobble???
  234. E Series Lowers and Lite Rails?
  235. AR Rail Question
  236. barrel differences
  237. Noveske Switch Block - STUCK
  238. Where can I find some TW-25B?
  239. Gas tube roll pins specs??
  240. Whats the right bolt for Mid Length AR?
  241. Can a 300m battlesight be used with the A2 rear sight?
  242. Spare BCG... need fitting?
  243. Is the 16" Bushmaster SuperLight barrel the lightest available?
  244. Parts compatability lwrc?
  245. New Springfield Trigger
  246. Buffer question
  247. new bolt/barrel extension mating-- inspection pics
  248. Stag Lower with LaRue Tactical Upper
  249. Daniel Defense RIS 2 length?
  250. I bet you haven't seen a malfunction like this!