That is kind of a vague question.
What are you wanting the rifle to be?
A short quick to deploy rifle?
A high fps, long range rifle?
A short range extremely accurate rifle?
A CQB style rifle?
Each one of those options has a completely different way to modify the rifle to do that specific job.
What are you wanting the rifle to be?
A short quick to deploy rifle?
A high fps, long range rifle?
A short range extremely accurate rifle?
A CQB style rifle?
Each one of those options has a completely different way to modify the rifle to do that specific job.