What buffer tube do I need for my AR-15?

H2 Buffer — 4.6–4.7 oz. The second tier of heavy buffers is ideal for mid-length gas systems, though it’s common to find up to 4.7 oz buffer weights in pistol builds with under 16-inch barrels to reduce violent cycling. If you fire 5.56 NATO, a tier 2 buffer weight is ideal.

How does a buffer tube work at 15?

The AR-15 buffer tube (also known as the receiver extension), is the metal protrusion that sticks out of the rifle and serves two functions: it houses the recoil buffer mechanism, and it serves as the attachment point for the buttstock.

What is a standard size buffer tube?

Mil-spec buffer tubes have a 1.14″ outer diameter at the buttstock end. At the receiver end, outer diameter is 1.185″, which includes the height of the threads. Commercial tubes sport a 1.17″ outer diameter at the buttstock end. At the receiver end, outer diameter is 1.170″ with thread height included.

Why use a heavy buffer in an AR-15?

Increasing buffer weight of the reciprocating mass on an AR-15 can provide noticeable benefits, including reducing felt recoil and muzzle movement, and providing additional mass to aid feeding during the loading cycle. Of all the parts on an AR-15, the buffer is perhaps the most insipid.

Which is better mil-spec or commercial buffer tube?

The mil-spec tube threads—produced from 7075 T6 alloys—are rolled into the metal, resulting in taller and stronger threads. Commercial tube threads, on the other hand, are constructed from 6061 T6 billet aluminum and are cut into the metal, producing slightly shorter and weaker threads but at a lower cost.

What is difference between mil-spec and commercial AR-15?

The significant difference between the mil-spec and commercial AR-15 buffer tubes is the outer diameter of the stock-end, which will also determine the type of buttstock you buy. At the buttstock end, the commercial buffer tube is . 02” wider than the mil-specific buffer tube—1.168″ vs. 1.148″ diameter respectively.

What is the best buffer for AR15?

What Are Some of the Best Buffer and Buffer Spring Options Available?

  1. JP Enterprises Silent Captured Spring AR-15 Buffer System (GEN 2)
  2. Bravo Company AR-15 Buffer Tube Assembly Kit (Mil-Spec)
  3. Spike’s Tactical AR-15 Buffer Tube Assembly Kit (Mil-Spec)
  4. Spike’s Tactical T2 Buffer.

Why is my AR15 short stroking?

Short-stroking occurs when the bolt and carrier do not travel fully rearward upon firing. When this insufficient travel prevents the bolt from picking up the rim of the top cartridge in the magazine on its forward stroke, feeding issues result.