Bufferless Upper Bullpup Conversion (FM-15, JAKL, BRN-180, Dissent, ARAK, MAT9)

Bufferless Upper Bullpup Conversion (AR-15)

Search terms: AR15 bullpup conversion kit / AR-15 bullpup conversion kit / AR 15 bullpup kit.

Shop the LeMay AR15 bullpup conversion kit

If you’re searching for a bufferless upper bullpup conversion, the LeMay platform from AR Force Arms is built around modern configurations—especially side-charging and bufferless setups—so you can go compact without turning your build into a science project.

LeMay Bullpup Conversion Kit: Shop the LeMay kit

Quick fitment check (before you buy)

  • Handguard: KeyMod or M-LOK, minimum 6.5″
  • Trigger requirement: your AR’s rear trigger must be CURVED (flat-faced rear triggers not compatible)
  • Choose your configuration: select the correct Upper Receiver Option on the product page

Need confirmation? Contact us with your upper + lower model and handguard length and we’ll confirm fitment.

Supported bufferless / side-charging examples

The LeMay compatibility ecosystem includes popular modern setups such as:

  • Foxtrot Mike FM-15
  • PSA JAKL
  • Brownells BRN-180
  • CMMG Dissent
  • Faxon ARAK
  • Matador Arms MAT9
  • Law Tactical ARIC / Evolution Weapon Systems (bufferless BCG systems)
  • Dead Foot Arms 2.5″ (rear-charging)
  • Bufferless rear and side charging hybrid setups

For the full fitment breakdown, use the LeMay Compatibility Guide.

Why bufferless uppers pair well with a bullpup conversion

  • Clean rear packaging and simplified geometry for compact builds
  • Side charging options that feel natural with bullpup ergonomics
  • Modern modularity for configurations beyond traditional receiver extensions

Want the design overview? Read Technology and the FAQ.

Order + support