- Blue Spring w/ CAR vs White Spring w/ H?
- Interesting DD advertisement claim/bbl feature
- Exact barrel profile measurement of the Colt 6920? I am getting conflicting info
- Short Stroking
- over torqed
- Buffer Identification
- Geissele SAR questions?
- Colt carry handle/Asked and answered with pics
- 1 piece gas rings & BCM
- Need some help gentleman, lower problem.
- CMMG LE 16" issue
- Barrel Metallurgy?
- Colt FTE issues
- Geissele SSA-E on Colt AR (pre-2009)
- Seekins SP223 Lower - Out of Spec
- Need advice on a Gas block
- 24" AR only cycles on heavy grain rounds..
- ALG ACT in Colt 6920 Doesn't Function...
- Trouble shooting help. It pains me...
- barrel washer or spacer, not crush washer, not peel washer. BCE LWRC
- Bolt lug damage (unfired & out of the box)
- Firearm Engineers Please Step Inside
- Stupid bolt carrier question
- Tac-Con 3MR Trigger from KE ARMS - ATF Approved Select Fire???
- Out of spec F sight base? Affect accuracy?
- KAC BUIS
- FSB removal and reinstall for handguardcap require gunsmith?
- Short barrel FTE issues
- How's Sabre Defence barrel rank in Ar15 world?
- mk18 failure to extract
- All M4 gas tubes the same?
- Is "Tool Steel" the same as 8620 Steel?
- Buffer weight confusion
- How could one identify what type of Aluminum a buffer tube is made from?
- Colt 6920
- Enough Clearance?
- Intermediate Gas Tube Length
- Does type of Barrel Nut = Better Accuracy?
- Barrel Markings
- Tons of bolt-over-base malfunctions...help
- Ever seen a jam like this?!?!
- Another stuck barrel nut thread - tried everything I can think of - help needed.
- BCM Failures - Somebody Help This Individual Found On Youtube.
- Upper reciever swap with pinned muzzle deceive on barrel assembly?
- rifle build headspace check
- Measured height above rail.
- Can I use upper vise block to replace flash hider?
- Re-Cerakoting... What are the issues with media blasting.
- Barrel nitriding residue removal/solvents/toxicity
- Colt Lower Parts Kit Schematic
- Lancer AWM follower isn't engaging bolt catch – anyone else seeing this?
- Rather severe zero shift after Battlecomp 2.0 install
- noveske switch block owners, I need your help
- does lower brand make a difference?
- Geissele Reaction Rod OK on KAC SR15?
- Is there such thing as a clean HPT bolt?
- Low mass carrier with 14.5 middy barrel.
- Building SBR
- What would cause this? Rounds popping out of feed lips on all mags.
- Can't get a good barrel nut alignment.
- Compenstor Torquing
- Barrel nut help, please
- So, is this from being undergassed or is something else wrong?
- Hammer Pin Came Out
- Suppressor gas remedy
- Help me ID this buffer tube?
- Receiver question
- Buffer Retaining Pin Issue
- For those of you running SR-15s with the A5 system...
- KAC MAMS pinned and welded?
- Issues and Concerns
- Switching out Bolt Carrier Groups?
- Cracked barrel extention
- Closed Bolt EXTREMELY difficult to open
- Barrel profile question.
- Slight play in FSB normal?
- Hogue beavertail grip
- Question about chrome lining of a barrel
- Ever seen this before? AAC Roll pin in Bolt not set correctly
- tacsol .22 LT upper flashlight mount
- Bought an Adcor upper today
- Rail mounted front sight on free-float rail?
- Ejector retaining pin loose
- LaRue Tactical LT104 question
- Installing USGI barrel nut to specific torque/shaving any impeding teeth: problem?
- Trigger Sticking after "first stage" (With Video)
- Aimpoint Comp4s with LaRue QR Mount
- KAC SR-15 14.5" Ejection
- Is re-pinning a muzzle device necessary?
- Installing Front sight gas block on a new barrel
- Tac Sol AR22 LT
- Intermittent Failure to Extract on Colt LW Carbine
- Rust on new BCM BCG?
- BCM front sight taper pins fit a Colt M4 F mark front sight/gasblock?
- Bolt fails to stay open on PMAG M3 but ok with Lancer L5 AWM mag
- Bolt carrier group getting stuck in buffer tube
- Lightweight Barrel? (specifically Daniel defense)
- kac and geissele reaction rod...
- New Sharps Relia-Bolt design using S7 tool steel.
- How to remove B5 Bravo buttpad????
- Noveske Switchblock Gas Tube
- Buffer and spring combos
- Carrier key loosening over time? Bolt stretch?
- Lube and the Polar Vortex.
- KAC Mod 1 vs Mod 2?
- Geissele gas block fit under Centurion CMR rail?
- Colt 6721
- (Closed)
- Sigh. New owner assembled lower for Noveske .300 Upper Being Tempermental
- Smack Your Front Sight To Make It Zero Correctly- WHAT?
- Buffer weight order.
- Hitting High: Pic Gasblock w/ MBUS Front & Rear
- Updated 2/11/14: Anyone ever have a barrel indexing pin come loose?
- Barrel Mounted Tri-Rail Effecting Elevation?
- S7 tool steel bolt
- Geissele vs. Noveske
- LMT Enhanced Carrier Quality?
- Spring pins for Low profile gas block pinning
- AR performance 5.56 bolt
- Front Sight Post which one do I need?
- Loose Muzzle Device
- 1:7 twist with .22?
- Geissele Trigger not resetting in MK18
- BCM's new fluted EWL profile barrels (tapered) -- questions/thoughts
- KAC SR15e3 Question?
- New Noveske rails out of spec?
- 4140 CMV...4150 CMV...does it even matter?
- Which muzzle device (not a can) to mitigate sound/pressure from a muzzle blast?
- LMT Enhanced Carrier with 6.8SPC?
- M16 bolt-carrier history ?'s
- ejector roll pin partially out
- H6 Buffer.
- Need Help Identifying an 80% lower receiver
- Help needed with choosing a buffer and spring combo for stag model 3h upper
- Question on BUIS
- Key holing everything! WTH?!
- Correct lower for a BCM 16" barreled upper with mid-length gas
- Precision rifle alternating between double feeds and short stroking-Troubleshoot how?
- Anyone have issues with the Geissele Mk4 barrel nut?
- barrel nut question / problem
- Troy Industries M7 CQB 16" upper assembly.
- where can I find a noveske cab 10.5" barrel?
- Kley-Zion M16/M4 Nickel Boron Complete Bolt Carrier Groups
- AR Ammo question
- New barrel Install ?
- Gas block stuck
- Washington Post Article on the M4 carbine relability
- knights keymod
- 70 GR TSX in a BCM SS410 1/8"
- another gas block stuck situation
- TO PIN OR NOT TO PIN ??
- V-7 ultra- lightweight products
- Bolt carrier weights
- New LMT Torque Wrench
- ADCO vs Ranier
- LMT MRP NEW SS Barrels
- Latch parts for LMT SOPMOD
- BCM Gunfighter Compensator Mod 0 vs Mod 1
- Lower Parts Kit Side by Side Comparison
- Concentricity
- Need some assistance choosing a BCG
- Upper for SP1
- New LMT BCG no good?
- free float tube install
- Larue fixed rear sight problem
- Geissele low pro gas block with BCM KMR fitment issue
- Wacky ejection after replacing a worn extractor
- Barrel extension wear FYI
- Need some help with a B5 stock issue.
- Paging all professional AR15 builders and gunsmiths. request
- Why don't barrels have wrench flats machined near the muzzle?
- bolt carrier group will not go into battery in upper [upate/results post # 61]
- Are these threads screwed?
- true brake verses hybrid
- 14.5" carbine or middy?
- Stronger Buffer springs, heavier buffers, but why do they work?
- little help with rifle length gas issue
- Need Help working through headspace issue
- Bolt catch engagement height issues
- Bolt Carrier Polishing Instruction Thread W/ PIX
- Did i mess up my lower?
- White Oak Bolt vs BCM Bolt?
- Help me out here.
- 300 AAC Blackout BCG not seating fully...
- Misfire Issues - Mid-Length AR build
- Port selector or heavier buffer for silencers?
- a5 Buffer Question
- My Centurion Arms Hand Guard today.
- Exposed gas blocks on Magpul's Carbine DVD?
- VLTOR MUR & Upper Flex tests
- Rifle doubled at range today, trigger question and FYI I'm not retarded.
- POF E2 extraction chamber technology?
- Removing BCM KMR rail for installation of IWC keymod bipod mount
- Could this nick be caused by the buffer?
- Clinking Noise when I Charge my Ar with New Forend
- magpul fixed rifle stock?
- CASV-el Ideal optics
- Stupid Question
- Salient Arms rifle-length gas tube on a carbine barrel?
- 9" AAC 300BLK failing to extract while unsuppressed
- Removing heavily staked buffer tube from BCM Factory Lower
- How to remove handguard triangle cap without removing FSB?
- DD RIS II install question
- Barrel Question - Handguard Cap Shelf.
- Stupid Question Part II
- Geissele barrel timing shims
- When is copper fouling bad?
- Chamber not aligned with bore axis
- Pin and weld. Will the muzzle brake move a little?
- Adjustable gas blocks
- 308, charging handle pops off notch on upper receiver
- New barrel causing bolt to become stuck in battery?
- Keyholing
- Magpul BAD lever on NEA15
- overgassing issue
- Buffer weight question
- Semi-technical thread regarding torque on barrel nuts.
- Anyone running a Mag tactical lightweight lower?
- Bullet scoring upon feeding
- Castle nut question
- Question about A2 stock setup??
- PMAG 10 M3, is this normal?
- IWC end plate on A5 no go
- Vortex Sparc Opinions/Experiences?
- 14.5" w/ PA FH & attaching a suppressor?
- Kac RAS rail system, lower rail loose. Know what the problem is, I need a fix.
- Gas Block Help
- Trick to Installing M4 Auto Sear Pin?
- Critique my tuning...
- Drill bit for gas block pinning on nitride-treated barrel
- Action spring pressure measurements.
- Front sight block help
- Need help from experts on strange problem!!
- Buffer wt vs Velocity
- CMC trigger pins
- FTF during rapid fire?
- Sionic gas port size?
- M4 Feed Ramp Alignment Issue/Question
- Off Kilter Gas Key
- M4 Feedramps
- BCM KMR compatible with MUR upper
- What would cause an AR to double/triple fire?
- BCM firing during trigger reset
- Zeroing Issues - Suppressed SBR
- Mystery malfunction?
- Need advice on contouring vs. fluting vs. dimpling
- Premature bolt lock
- LMT LPK's....out of spec parts?
- Ammo Type & Barrel Wear/Life/Performance
- Bolt Failure today..