Two items from CYMA are in stock at Get Reload. The first one is the CYMA Metal Original AK Side Mount Adapter w/ Mounting Hardware which should fit most AK airsoft guns and allows you to mount optics or scopes to your AK and the second one is the CYMA Handguard w/ Rail & Handguard Fixture For M14 which should give you more mounting options to M14 airsoft rifle.

"CYMA Metal Original AK Side Mount Adapter W/ Mounting Hardware US$11.99

• Universally compatible with most AK rifles that feature mounting holes on the left side of the receiver
• With this side mount installed, you can easily install a rail mount that allows you to mount optics/scopes onto your AK rifle
• Full metal build

CYMA Handguard w/ Rail & Handguard Fixture For M14 (Black) US$59.99

• Replaces of original M14 Handguard
• Fit for M14 Airsoft
• Handguard Built-in with 20mm width Top Rail
• Includes 2 x Short Tactical Rail & 1 x Long Tactical Rail
• Allows attachment of Scopes, Flashlights & Laser Sights, Foregrip.
• Also included 4 x Handguard Fixture
• All new tactical look for your M14 Series Airsoft AEG Rifle.
• Hole Design offers increased heat dissipation for both of them"