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Angstadt Arms AR-15 9mm 5.4 oz Carbine Buffer Assembly w/ Carbine Buffer Spring, 9mm Buffer Spacer
$59.99 $55.99 Save $4.00
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Most Helpful Positive Review Worked perfect
bought this for my 9mm build. Great price and comes with the spacer. Have put 300 rounds through my ar9 with no issues. Has the last round bolt open and keeps it from breaking. I would recommend this for any build thank u
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Great deal

by G, Verified Owner from OH, United States Written on May 18, 2025
Shipped fast. Works great. Easy to install. Definitely worth the money.
Would recommend: Yes
Was it helpful to you? Yes | No

Colt pistol 9mm

by CH, from GA, United States Written on October 24, 2022
Good buffer weight and spring 150 rounds through holding up just fine. Previously had a flat spring with 7 ounce weight bolt moved to slow couple failures to feed and to eject !!!!!!!!!!!!!!!!!!!!!!!!!!
Pros:
  • fast shipping , good price
Cons:
  • None
Would recommend: Yes
2 of 2 found the following review helpful.
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Runs Flawless

by BL, from MA, United States Written on July 29, 2022
I was a little unsure what buffer weight I would need to run in my AR9 build. After some research I came across this angstadt arms kit. The 5.4oz buffer weight runs flawlessly without issues. I would buy again.
Would recommend: Yes
1 of 1 found the following review helpful.
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Tankdriver

by Tankdriver, from FL, United States Written on February 13, 2021
Works perfect with carbine stock. Original buffer was bit too heavy. So i swapped out spring and buffer for Angstadt arms buffer and spring! Smooths out recoil also shooting 124 grn jacketed ammo! I used this on a Colt 9mm Match Target with a 3lb Timney drop in trigger. So much fun to bang on steel!
Pros:
  • Nice packaging
  • well constructed and light weight
Cons:
  • None
Would recommend: Yes
1 of 1 found the following review helpful.
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9mm buffer

by Cody, from NE, United States Written on September 24, 2020
This works flawlessly for 9mm. I'm running the mean arms p mag kit and the trybe defense 9mm bcg. 200 rds so far not one problem. Would absolutely recommend to anyone. Was really unsure which buffer to go with. Glad I went this route
Would recommend: Yes
2 of 2 found the following review helpful.
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Awesome all in one kit!

by Douglas D, Verified Owner from MO, United States Written on August 31, 2020
I bought this kit because it included everything for an AR9 build. Each piece has a very nice finish to it and has proven to be very durable and reliable. I have this set behind a 16" overall length barrel (14.25 w/o flash hider) and I have fired ammo from factory charge defensive ammo down to hand loaded, low charge target rounds and have had absolutely no cycling issues. There is no hard recoil with the factory charges and no evidence of wanting to short cycle with the low velocity (<900fps) target ammo. All in all a very nice kit for an AR9 carbine.
Pros:
  • High quality
  • Great fit and finish
  • Reasonably priced
Cons:
  • None
Would recommend: Yes
1 of 1 found the following review helpful.
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Awesome Buffer Kit!!

by Joaquin Garcia, Verified Owner from FL, United States Written on July 1, 2019
Worked well with the Angstadt setup! Built the gun exactly as is sold complete by Angstadt with all factory components, no issues whatsoever cycling with 500 rounds down range. Can’t go wrong with anything Angstadt, quality parts all the way! So if your needing a quality part for ur ar9 build, try this spring out, comes with spacer an buffer.
Would recommend: Yes
2 of 3 found the following review helpful.
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Excellent 9mm AR Spring

by Enthusiast, Verified Owner from FL, United States Written on March 18, 2019
I was initially concerned about a proper functioning recoil spring for an AR 9mm with a blowback system. I originally looked at a standard AR spring, separate heavy buffer, and a spikes tactical spacer. Fortunately though, this offers all three in one package. As for function, I have had zero issues running my AR 9mm.
Would recommend: Yes
1 of 1 found the following review helpful.
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