by UnaStamus on Sun May 04, 2014 11:54 pm
Here's my opinion from both training and professional/operational experience: Magpul is superior.
Rigidity:
The polymer used in the Lancer L5 AWM is very flexible, and this can cause deformation. This affects reliability because when the upper portion of the mag flexes or deforms, it can start spitting out rounds. I have had double-feeds from Lancers for this reason. This is also an issue with relation to durability, because Lancer uses translucent polymer which is not as strong and durable as other forms of polymers.
Magpul PMAGs are very rigid and durable. They don't flex and cave like the L5 AWMs.
Round Count:
The translucent nature of the L5 AWM is handy for determining round count, but once you get below about 12-15 rounds, you can't see your ammo anymore and you don't know how many you have left. Operationally, this is a good time to do a mag change as a safety precaution. However, if you have 12rds left in the mag during training, you're now creating unnecessary clutter in your dump pouch and reducing the number of full mags you have available on your person. It results in more mag changes and more "shuffling" of mags as you deplete your ammo load.
Magpul on the other hand has a marked spring that accurately tells how many rounds are in the mag down to depletion. The windowed PMAG is a much better system for ammo management.
Failsafe:
Lancer L5 AWMs have no failsafe system in place in their design.
Magpul uses a special sonic weld on the spine of the magazine. If the feed lips break or splay out, this will crack the rear spine and cause the sonic weld to break, disabling the magazine from further use. It prevents you from using a junk magazine. It's not guaranteed system, but it's a much better system than what anyone else offers.
Seating on Full:
I have noticed difficulty seating full L5 AWMs into a closed bolt AR. Most mags have this issue.
Magpuls reliably seat on a full 30rd mag, and you don't typically need to download them to 28rds like you do with others. this is obviously subjective as certain rifle specs may make this more or less true. However, in my LaRue, BCM and Noveske ARs, I've found this to be true.
As always, YMMV