Uronen Precision Modular Buffer System MBS AR-15

Available with 4 different buffer weights and with 2 different recoil springs:

Buffer UL ultralight 36 grams
Buffer L light 48 grams
Buffer R regular 75 grams
Buffer H heavy 95 grams

Spring L light: for AR-15 raceguns with roller cam pin

Spring R regular: for whatever AR-15, expect UP MBS with UL buffer

UL is designed for rifles with aluminum or titanium bolt carrier, light recoil spring and roller cam pin
UL also works with Uronen Precision Low Mass Steel Bolt Carrier

L is designed for AR-15 rifles with low mass steel bolt carrier

R replaces typical military specification buffers A1/A2 and M4

H is designed for AR-15 rifles that need heavier buffer and heavier recoil springs, for example Finn Precision PCC and .223 16" with carbiine gas system


For stroked delayed blowback PCC version, please see here:  https://www.asejaosa.fi/index.php?id_product=1330&controller=product&id_lang=1&search_query=pcc&results=23

We recommend removing buffer retainer for easier field stripping

To use MBS with A1 rifle buffer tube, please use MBS adapter: https://www.asejaosa.fi/index.php?id_product=1329&controller=product&id_lang=2&search_query=mbs&results=12