ADAPTIVE ARMAMENT - Spectre PDW 10.5" Airsoft AEG JT 68/4500 so you may see that

so you may see that they are compatible

Magazine Capacity: 400 round High-Capacity

Notable improvements inside and out include an Elite Force flat-faced blade trigger

Improved rechargeable illuminator

ADAPTIVE ARMAMENT - Spectre PDW 10.5" Airsoft AEG JT 68/4500 so you may see thatFeatures: Inline programable MOSFET Collapsible PDW stock or Convert Buffer Tube and Standard Stock 10" M Lok handguard Detachable iron sights Ambidextrous fire controls Manufacturer: Adaptive Armament FPS Range: 340 350 FPS with . 20g BBS Specifications: Length: 31. 5 34. 5 in Weight: 4 Lbs Inner Barrel: 280mm Magazine Capacity: 300 Round Hi cap Magazine Thread Pitch: 14mm negative Gearbox Type: Version 2 Motor Type: Long Hop Up Style: Yes Adjustable