Q&A for Spikes Tactical Heavy Tungsten Carbine Buffer — 21 Questions & 25 Answers

That depends on a ton of variables including, but not limited to caliber, barrel length, gas system length, gas block style and ammo. It is always best to familiarize yourself with the firearm platform you are putting together and to understand the way an AR or any firearm actually functions. For most AR's an H-weight, which is usually around 3.8 ounces, is generally a good place to start. From there function testing the firearm will tell you whether you need a lighter or heavier buffer depending on the recoil impulse of the firearm, whether the firearm malfunctions and how the firearm is functioning in general.

I would recommend using the 3oz carbine buffer (MPN:SLA00T1) for optimal reliability and functionality.

Yes, the Spikes Tactical Heavy Tungsten Carbine Buffer will work for a 6.5 Creedmoor AR rifle. I would recommend starting out with an H1/H2 style buffer. The 4.0-ounce buffer should work fine MPN:SLA00T2.

They are about 3.5".

I would recommend the 5.5 oz buffer.

I would recommend the 4 oz buffer weight.

Yes, that would work just fine.

It might, but you should try to see what your issue is first, whether it's gas or buffer weight as the culprit.

The easiest way to determine if you have a gas issue (not enough to catch the next round) or a buffer weight issue (too much gas pushing the bolt too fast) in a failure to feed situation is to load a single round in a magazine and fire it to see if the bolt locks back. If it locks, you may need to try a heavier T2 buffer. If it doesn't lock the bolt back, you may have a gas issue to sort out.

You could probably safely start with a T2 and make determinations from there if further adjustments are necessary.