Can I use a non KAC bolt carrier in my Sr-15?

[Manoloiv]

Greetings,


I would like to use a low mass Bolt carrier in my KAC SR-15 with the E3 bolt.

Will it work?


Thanks

[patriot_man]

Greetings,


I would like to use a low mass Bolt carrier in my KAC SR-15 with the E3 bolt.

Will it work?


Thanks

I would not change the mass of the bolt carrier.

The KAC system has been engineered to work well with the specific components in mind.

[Manoloiv]

Im trying to soften the backwards recoil impulse while speeding up the gun

I feel like there is a small delay similar to the scar 16 but not as pronounced.

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[Failure2Stop]

Greetings,
I would like to use a low mass Bolt carrier in my KAC SR-15 with the E3 bolt.
Will it work?
Thanks

We have painstakingly managed the recoil cycle of the SR-15 and do not see that a low mass carrier would be of any benefit, and likely would impair functionality.

[Manoloiv]

We have painstakingly managed the recoil cycle of the SR-15 and do not see that a low mass carrier would be of any benefit, and likely would impair functionality.

thanks for the reply regarding the low mass bolt carrier in the sr15. How can I minimize the backwards push i feel from my gun? It seems as though the recoil impulse is delayed similar to that of the scar 16 but not as pronounced.
I find my sr-15 has more recoil than the legacy mod 1.


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[TheChunkNorris]

What type of shooting are you doing exactly.

[Manoloiv]

What type of shooting are you doing exactly.

Classes, steel and targets


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[TMS951]

I have an early SR15 E3 upper.

It would not cycle some cheaper 55gr. Steel cased ammo, even with the supplied carbine buffer, it never cycled this ammo reliably even with a hot gun in the hot summer. It also would not cycle quality .223 ammo (Prvi 75gr.) in the cold. Because of not being able to further reduce buffer weight I was only able to reduce carrier weight. I purchased and installed a JP lo mass carrier. This fixed my problem. To further tune the system I went to an H buffer. An H buffer + JP lo mass carrier still weighed less than the milspec carrier and carbine buffer combo, but it allowed the gun to cycle my training ammo, and other ammo in the cold.

I only did this to fix a problem I had due to the gas port size of this gun. I believe since then the gas ports have been increased and this problem no longer exists. I you don't have a problem I probably wouldn't change anything.

When not running this ammo, and running 5.56 I went back to a full weight carrier and an A5 system with an A5H0 buffer.

[TheChunkNorris]

I have an early SR15 E3 upper.

It would not cycle some cheaper 55gr. Steel cased ammo, even with the supplied carbine buffer, it never cycled this ammo reliably even with a hot gun in the hot summer. It also would not cycle quality .223 ammo (Prvi 75gr.) in the cold. Because of not being able to further reduce buffer weight I was only able to reduce carrier weight. I purchased and installed a JP lo mass carrier. This fixed my problem. To further tune the system I went to an H buffer. An H buffer + JP lo mass carrier still weighed less than the milspec carrier and carbine buffer combo, but it allowed the gun to cycle my training ammo, and other ammo in the cold.

I only did this to fix a problem I had due to the gas port size of this gun. I believe since then the gas ports have been increased and this problem no longer exists. I you don't have a problem I probably wouldn't change anything.

When not running this ammo, and running 5.56 I went back to a full weight carrier and an A5 system with an A5H0 buffer.

Seems like you did that for the sake of running certain ammo which is a valid reason. The OP is looking lessen recoil which is crazy to me... there's little recoil to begin with.

[Manoloiv]

Seems like you did that for the sake of running certain ammo which is a valid reason. The OP is looking lessen recoil which is crazy to me... there's little recoil to begin with.

My goal is to increase speed while maintaining accuracy , the sr-15 has more of a backwards push than my legacy mod 1.
Im running a fsc556 and regular ammo, no cycling issues.