Products / AR-15 Piston - Anti-Tilt

Anti-Tilt Piston Buffers

Note: The buffers on this page are designed to fit bolt carriers with a 5/8" nominal inside diameter. This includes the majority of all piston systems. Some ARES Defense, LMT, PWS, and a few other carriers have a 1/2" nominal inside diameter. Anti-Tilt Buffers for those systems are available here: 1/2" Anti-Tilt Buffers

This is the original Anti-Tilt buffer, designed to prevent excessive wear to the receiver extension (buffer tube) caused by bolt carrier tilt/cant in the popular piston-driven ARs. The elongated head of the buffer is centered in the bolt carrier by the 'nipple'. This setup prevents contact between the bolt carrier and the buffer tube.

Tested and proven with Adams Arms, Ares Defense, CMMG, HK, LMT, LWRC, Osprey Defense, POF, PWS, Rock River, Ruger, Sig, Stag Arms, and many others.

Please notify me via email after placing your order if you have an LMT or ARES Defense upper, their carriers are slightly different and require a custom buffer (same price). Newer PWS .223 systems also require this special buffer.

The buffer is constructed from 303 Stainless Steel for a lifetime of trouble-free performance. There are no moving parts to break, and no messy fluids/powders to leak out. A foolproof design for flawless operation of your weapon.

The head is polished to further reduce the possibility of buffer tube damage. Internal weights are either steel or Tungsten, depending on finished weight. Total mass can vary from 4.0 ounces up to 8.5 ounces.

I recommend an H3 (5.5 ounce) buffer for most applications with the following exceptions:

  • If you shoot underpowered/import/surplus ammo an H or H2 might be a better choice.
  • If you are running a suppressor the XH buffer (8.5 oz) is the best choice.

Please Note: I strongly recommend using Wolff XP carbine buffer springs with these buffers. Some standard OEM and aftermarket springs from other manufacturers will cause malfunctions. 'Flat-Wire' springs are not recommended in any case.

H - 4.0 ounces - $90

H2 - 4.5 ounces - $90

H3 - 5.5 ounces - $95

H4 - 6.5 ounces - $110

XH - 8.5 ounces - $125

Anti-Tilt Buffer Kit - $125

This kit includes a Wolff XP carbine buffer spring, an empty buffer body and various internal weights to allow 'tuning' the buffer to your specific firearm/ammo. Total weight can be adjusted from 4.0 to 6.0 ounces, or up to 8.5 ounces with the optional Tungsten inserts sold below.

Tungsten Inserts - Set of Three - $40

Wolff XP Carbine Buffer Spring - $15

HeavyBuffers Carbine Spacer

Carbine Buffer Spacer - $15

This Delrin spacer allows you to use any carbine buffer in a rifle-length buffer tube. Now you don't have to buy a new buffer If you change your stock type.

Anti-Tilt Piston Buffers

AR15 Rifle A/T Buffer - 12.5 oz. - $125

Wolff XP Rifle Buffer Spring - $15



Takedown procedure with an Anti-Tilt buffer installed is as follows:
Push out both pins.
Slide the upper receiver forward slightly.
Lift it away from the lower receiver.

Note: Specifications are subject to change without notice.