9mm CARRIER WEIGHT EXTRA HEAVY

This piece is a confirmed fit in both the PSA ARV and FailZero 9mm bolts. The standard weight for both is 2.5oz, sophisticated piece adds 2oz of weight. Easily swappable to increase reciprocating mass of the bolt, which is nice in situations where there aren't many options for buffer modification (SB HBPDW, Maxim defense). Overall very pleased.

I had a BCG that had a normal carrier weight that actually would need to be cut down to allow it to work with a Super Safety. I purchased this one and installed in place of the old weight and no cutting required. Plus the added weight should diminish the possibility of carrier bounce.

I used this in conjunction with KAK's 8oz PCC extended buffer to increase the weight of my DOE's action to 24.4ozs. By doing this it mitigates any bolt bounce and out of battery detonations which is common with AR9s with lighter actions. Not only that, this helps with recoil impulse. So remember folks, the rule of thumb is 22ozs or more for the combined weight of your bolt and buffer. The more the merrier. Good luck.

Kak makes fantastic products. This is no exception. Worked perfectly.

I used this on my Foxtrot Mike FM9 bolt. It didn't fit, but I saw on blowback9.com that you could make a sleeve for it. That worked great and my bolt went from 14.1oz to16.7oz. Adding the extra weight really helps slow down the bolt and bring down the felt recoil. I highly recommend.

The first one I ordered came with the hole for the roll pin drilled off-center and it couldn’t be used. I contacted KAK and they sent me a replacement ASAP. I wanted to use this in conjunction with a hydraulic buffer, so that my combined bolt and buffer weight would fall within 22-24 oz range.

love this weight. I have added 5 or 6 now to all various kinds of 9mm bolts. Definitely gets the weight up for blow back PCC.

I wanted to add some mass to my AR9 BCG/Buffer system to calm down the recoil. This added 2.1 ounces to my Faxon BCG. There was a review that included dimensions but some were missing so I will list them all here (they were helpful to me). The weight is 1.6" in length, 0.615" diameter. The hole for the roll pin is 0.25". The center of the roll pin hole is 0.6" from one end and 1" from the other. The bore of most AR9 BCGs where this weight will go is 0.625'-.630". Great product, great price, and I have not seen anyone else offer something like this for the AR9 BCGs out there. Great job KAK! Also, I reached out to customer service to get more dimensions and they emailed be back the next day with the answers. Great customer service!

These are great, I have bought about 4 or 5 so far to increase bolt weight for these newer lighter bolts. I have used on several brand bolts and has worked for me. Thanks KAK for making unique parts and affordable prices.