9MM AR Buffer
When building a 9MM AR-15 shooters are often surprised when they realize that their hardware choices can be quite complicated. A 9mm AR barrel and flash hider need to have matching threads. Only certain AR Triggers can be used and the subject of this page the 9MM Buffer. I discussed the 9MM AR Buffer Technical Issues in detail earlier. On that page I discussed causes and solutions to the broken bolt catch that 9MM AR shooters experience. I did not mention that there are plenty of 9MM AR’s using RRA and Colt 9MM Buffers without issue. Personally I run a longer and heavier buffer as discussed. Broken bolt catches are not the only reason to install a longer and heavier buffer. These buffers are also used to tame recoil which is better for the shooter and your AR-15.
The basic rule of thumb is run the heaviest buffer you can that allows the AR to function reliably.
Hahn Precision Sub Caliber Buffer 9mm SCB1205
Drop-in replacement for factory buffer the Hahn Precision Sub Caliber 9mm Buffer shortens stroke and reduces recoil on pistol caliber AR-15 conversions with collapsible M4 carbine-type stocks. Extra weight behind carrier reduces cyclic rate for improve controllability, feeding, and extraction on full-auto carbines. Self-contained unit with long head consists of long-wearing, precision-machined, stainless steel, fully enclosed lead insert, and polyurethane bumper. 7 oz. total weight. Will not work with rifle caliber uppers.
Heavy Buffers 9mm Q Buffer
The Heavy Buffers 9mm Q Buffer is the original extended length heavy 9mm buffer, engineered from scratch, not a cheap knock-off. Field tested and proven for over ten years.
Heavy Buffers developed the 9mm “Q” Buffer in response to a customer who was having a problem with broken bolt catches on his Colt 9mm rig. He was already using a special (and more expensive) buffer from a large Colt distributor. His gun was still breaking bolt catches on a regular basis. Heavy Buffers isolated the problem and designed this buffer to correct a flaw in the Colt setup.
With Colt 9mm bolt catches running $20+ each, a Q Buffer is cheap insurance against future problems. How many broken catches have you replaced already?
Heavy Buffers manufactures the heaviest 9mm AR buffers available!. There are several side benefits to the Heavy Buffers 9mm Q Buffer – Smoother function, less felt recoil and reduced rate of fire.
The Heavy Buffers 9mm Q Buffer was specifically designed and tested for use with Colt uppers and it has been successfully used in virtually every other brand. Any 9mm AR can benefit from installing a Heavy Buffers Q buffer. Heavy Buffers recommends Wolff XP buffer springs for maximum reliability.
9MM AR Buffer Dimensions
- COLT 9mm SMG Buffer SP62913 – Length 3.300″ , Weight 5.5 Ounces
- CMMG 9mm Heavy Buffer 90CA9B4 – Length 0.000″, Weight 5.3 Ounces
- Yankee Hill Machine 9mm Buffer YHM-925-A – Length 3.600″, Weight 5.9 Ounces
- Spikes Tactical ST-9X 9mm Buffer SLA009X – Length 3.700″, Weight – 8.5 Ounces
- Blitzkrieg Components 9mm Hydraulic Buffer – Length 3.900″, Weight – 6 Ounces
- Rock River Arms 9mm Buffer 9MM0107 – Length 3.250″, Weight 5.5 Ounces
- Hahn Precision Pistol Cartridge Buffer 9mm Buffer – Length 3.6875″, Weight 7.0 Ounces
- Heavy Buffers 9Q Buffer – Length 0.000, Weight 8.5 Ounces
- Heavy Buffers 9QT Buffer – Length 0.000, Weight 12 Ounces (For SBR’s and Full Auto)
- New Frontier Armory 9mm Buffer – Length 0.000, Weight 8.0 Ounces
- New Frontier Armory 9mm Buffer – Length 0.000, Weight 10.0 Ounces
- VLTOR A5 H4 Heavy Buffer – Length 3.995, Weight 6.83 Ounces
9MM Buffer Spacer 5 Quarters = .345″