This member has admitted he has no defence, but has asked members to help him illegally obtain a rif.
Until he can prove a lawful defence, no one should help him obtain a rif, anyone who does potentially puts airsoft in the uk at risk, & will be banned from the forum.
Until he can prove a lawful defence, no one should help him obtain a rif, anyone who does potentially puts airsoft in the uk at risk, & will be banned from the forum.

But for a real answer, the bottom half of the handguard should unscrew out, the m203 clip (specific to the DD rail) should go over your barrel (As long as the barrel is UGL cut?) and then the rear should fit the rear of your barrel like a normal m203 would. Other than the DD hanger and the barrel there’s no reason it shouldn’t fit