Assertion: rifle's receiver | /r/HasProperty | fitted with magazine filler blocks
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Source sentences:
text: With minimal funding available, the earliest T44 prototypes used T20E2 receivers fitted with magazine filler blocks and re-barreled for 7.62×51mm NATO, with the long operating rod/piston of the M1 replaced by the T47's gas cut-off system.
text: With only minimal funds available, the earliest T44 prototypes simply used T20E2 receivers fitted with magazine filler blocks and re-barreled for 7.62×51mm NATO, with the long operating rod/piston of the M1 replaced by the T47's gas cut-off system.