主权项 |
1. A handguard configured to be aligned with an upper receiver comprising:
a tubular portion, where the tubular portion has a long axis, where the tubular portion has a plurality of openings along the long axis, where the tubular portion has a non- circular cross-section, and a first inner portion of the tubular portion, where the first inner portion is configured to slide snuggly over a contact portion of an attachment to a barrel, where the first inner portion is configured such that if the tubular portion experiences a flexing force then the tubular portion engages the contact portion to provide a counter force opposing the flexing force, where the contact portion is part of the outer surface of the attachment; an extension rail attached to the tubular portion; and an alignment feature, where the alignment feature is configured to contact a portion of an upper receiver and align the tubular portion with the upper receiver. |