- SWS rails
- Barrel replacement
- MEGA puts out a new TRIGGER...
- blown primers running 14.5 w/ suppressor
- Receiver dimensions...?
- wolff buffer spring
- Colt MT6400c Brake Effectiveness?
- Iron Sight Apertures
- LMT CQB MRP Piston Caliber Conversions
- Noveske Switchblock Range Report
- Is this the new Daniel Defense Handguard system?
- bcg comparisons
- Stupid Crush Washer Question: Which side where?
- MK18 MOD1 Technical Thread
- BCM FSB Taper Pins
- Potential problem with GTS Thunderbolt BCG
- Love the SOPMOD. Does the Magpul ACS or Vltor IMod compare?
- AR trigger upgrades
- Correct end plate install?
- BCM Lightweight Barrel Contour/Best LW Barrel?
- Gas System Question
- Tell me about the Noveske N4 barrel
- New build double fires then no hammer reset
- Timing a blackout
- A lower measurement request
- SR-15 crowning?
- Sub-$200 FF Mid-Length Rail System
- Rail for a Lightweight Build?
- Carry Handles
- AR won't feed!!!!!!
- M4 Jammed in Battery
- RRA Two stage Trigger
- Primer dimpled on unfired round?
- Military Specification
- Rifle Length Buffer Tubes?
- Updated Apex Hndguard Weights
- DDM4v5 FTFeed.
- Adjustable Piston upper questions
- help with a problem
- Steel vs Aluminum Barrel nuts - real world pros & cons?
- Bravo Comp 14.5 Middy with RISII
- Best way to cut a rail?
- What barrel nut torque on DD Lite Rail for best accuracy?
- new carbine won't eject rounds...
- Trigger Problem.....AR-15
- Thoughts on front sight base
- Weird thing happened at the range today.
- helps with this Oly
- Low-pro gas blocks, help my understand why...
- Brownells magazine floorplate issues?
- Upper Receiver Lapping Tool
- Oil in the chamber area?
- barrel swap or new build
- ultimate m4 upper
- Sight questions
- Castle Nut
- Problem with DD uper and my N4 lower
- Colt Sear Block
- Safely removing Castle Nut
- QUIETEST Muzzle Break/Comp?
- Magpul B.A.D. lever
- rainier arms ultramatch
- Question about Improved Battlesight Zero
- ? on Clamp on front sights
- Shaved FSB "bubba gun" ?
- Midlength barrel installed now having issues.
- .300-221 not ejecting spent case
- Trigger question
- A2 Front Sight Dimensions
- Buffer Question
- It this gas key properly staked
- Non F marked FSB, need longer post?
- stuck bolt
- Why Larger Gas Ports For Short Gas System?
- Question
- Building an SPR any advice?
- Rifle buffer system vs carbine
- AR15 Performance Super Bolt
- Shot Peening
- BCM/DD 14.5 Gas Port Sizing
- Headspace
- case extraction problems
- Magpul BAD lever with Norgon Ambi Mag release
- Will pig fit on dd upper
- Troy Fixed Battle Sight Aperture Issue
- Osprey Piston under a VTAC Modular Handguard?
- Gas port dimensions for 18" barrel?
- small chips in finish
- Lower reciever build problem.
- Colt 6940 split case necks
- Going low-pro on 6920: MK18 RIS II or standard RIS II
- Magazine Function Check
- VLTOR MUR + Magpul BAD = Clearance issues and bolt catch rub on carrier
- Failure to Feed
- Accuracy of BCM SS410 16" Mid Length
- Carbine vs Mid
- Bolt Carrier rebuild
- Bolt Carrier Group stuck - help please
- Shaved 14.5": will a DD Omega 12" fit?
- Geissele SSA-E FCG pins rotating
- Canted FSB or fubar BUIS? update with new test
- BCG confusion
- School Me On Brass Ejection Patern(s)
- 14.5 with pinned hider
- Noveske Extractor O-ring Question
- Moving BCG to new upper
- Big thanks to Nick at Magpul and M4Carbine re: Staking an ASAP
- Which sight it this ?
- 5.56mm chamber geometry
- New upper, new bolt. Problems?
- Anti-Seize on Receiver Extension
- Charging handle rubbing lower
- What are the odd's of this happening
- Reasonable smallest OD to contour a barrel
- Problem with popped primers
- Has anyone here broken a bolt catch spring?
- Daniel Defense Problem?!?
- Drop-In Rail Dimensions?
- Smartgunner.com MK18 question
- Technical Upgrades to the AR-15 platform?
- A1/A2 handguard rail adapters for a light or handle for the picatinny rail,etc.
- ALL else being equal, which one shoots softer...a 14.5" midlength or 16" midlength?
- 16" middy barrels with .75" at muzzle for FSB - dissy
- Magazines
- What is the correct buffer weight for a midlength?
- Gas Tube Length, Dwell Time, Gas Port Size- Do They Really Increase/Decrease Recoil?
- Colt M4 Upper with FN 20 inch barrel...will it work?
- Problem with my latest build
- Weapon light reflecting off exiting gas??
- Which buffer?
- Spacer slop on fixed stock
- Poorly machined carrier?
- Is my key staked OK?
- Help Needed to Remove Flash Hider
- Doublefeeds: Primarily a function of the magazine? Extractor? Op system issue?
- Surplus Ammo and Arms Stripped Lower Review
- Sabre Defense Barrels?
- casting mark is unknown ?
- velocity , 55gr. FMJ , out a 18.5'' barrel ?
- Which Upper to go with
- M4 feed ramps or not? (w/ pics)
- Lightweight barrel accuracy loss when hot?
- M4 vs. Midlength vs. Standard
- longest handguard for a midlength gas system?
- Metallurgical difference between M4/AR15?
- BCG help needed
- Barrel Twist
- Preferred barrel length for precision AR?
- Cracked FSB, weld it?
- Buffer tubes and gas system/barrel length
- what are the PSI's
- Government Profile Barrel
- buffer spring length
- Keyholing?
- Troy MRF 13.8 rail bottom rail movement
- which DD rail and gas block for 14.5" AR
- Shooting "Out" A Barrel While Shooting?
- Fail Zero gas key and carrier?
- UBR tube and A5/RE10 tube
- Creating a MalfMag
- A1 shooting low
- Bolt wont pull back
- Ambi mag release with BAD lever.
- Why exactly is BCM so special?
- Barrels w/out M4 feedramps
- LMT BUIS
- Upper assembly questions
- FSP rail contacting FSB
- DPMS / BM / Rem R15 Armorers Course @SHOT
- installing a redi-mod on a lower with no removable trigger guard
- Rear takedown pin with UBR butstock
- Delete post
- Noveske mid upper/sws rail, tight fitting gear
- Rate of fire for stainless barrel?
- gas tube steel
- buffer weights
- Fiberglass Hand guards versus plastic hand guards? Any technical advantage?
- Tubbs CS Trigger Springs?
- Failure of bolt to lock back after firing last round.
- Best Semi-Auto Bolt Carrier Group?
- Bolt Locks on Full Magazine?
- Full Size AR Extractor Upgrade
- MB556AR & peel washer
- like an idiot....
- Cyclic rate of fire of KAC SR16E3?
- Changing muzzle device
- BCG Keeps Getting Stuck Forward
- Ruger SR-556 Carrier Tilt
- Could this be (gulp) rust??
- Quick tech/safety question?
- Upper receiver/barrel nut
- Movement of gas tube?
- Surefire MB556AR Installation
- What should I upgrade on my Colt to make it run naturally better?
- MagPul MOE middy handguard review
- shaving part off Magpul BUIS
- What is primary extraction?
- Bolt catch pin installation
- Troy Battlerail 12 MRF-CX
- overtorqued barrel
- Gas Question Involving Switchblocks and BBL Length
- DD to KAC Weight Comparison
- First time building AR
- DD CHF 12.5" Gov't Vs. Lightweight Profile
- What is the default A2 sights zero setting?
- National Match Bolt Carrier
- switching out stag model 8 barrel
- Bolt won't lock back on an empty mag.
- AR gas block
- Are "out of spec" lowers common or am I unlucky?
- safety selector removal with timney trigger?
- Lightweight Upper Considerations before I pull the trigger
- BCM SOPMOD Bolt Upgrade/Rebuild Kit - is it worth it?
- DD Omega 7" and Rail Gas Block
- Differences in older Colt 6920
- Can i fire 5.56 out of my Colt 6601c 1 in 7 Hbar?
- Lowers: teflon over anodizing vs. just anodized
- Bolt carrier question-see pic
- Am I Nuts, Or Am I On To Something?
- Modifying Colt SP1 2 Hole Carbine Stock?
- Two quick tech Qs on KAC Micro front sight...
- History of the mid-length gas system
- Headspacing?
- Trigger pin walking?
- DD Omega Rail touching handguard retainer?
- More Qs on Mega Mono - Modular (tube)
- Noob help: M4 will not disasmble
- Removing flash hider
- Failure to return to battery ?
- S&W MP lowers
- First upper build: Do I need go/no go headspace gauges?
- Kino build question. Is the handguard cap attached with a set screw?
- Question for the Armorers
- Fit/Compatibility check: SF FA556AR suppressor and 12" Larue on 16" barrel
- Wife's Rifle
- Ban era Colt lower
- Bolt/Barrel Wear Question
- DD 14.5" Midlength FTF
- Can dyeing plastic cause it to weaken?
- Front Sight Base question (dimensions)
- S&W M&P marked Pmags?
- larue tactical info?
- Bushmaster trigger trouble
- remove/install a barrel
- Patina? on the inside of flashhider/crown
- Carrier dragging
- What size gas block on a 6920
- Are charging handles universal in all AR15's? between M4 style vs Rifle Length AR15's
- Procedure for compensator replacement...?
- DD 14.5 Middy Feed Ramps?