The FPS Delayer DL03, designed in collaboration with Nikk Sakk, is an internal accessory aimed at optimizing rate-of-fire behaviour and shot consistency on high-ROF AEG platforms. Manufactured from loaded technopolymer, the DL03 deliberately delays the tappet-plate opening and postpones closure while increasing BB seating speed — reducing power drop during sustained bursts and improving feeding reliability from magazines under heavy cyclic rates.

Installation requires a minor modification to the tappet-plate rod “fin” to achieve correct interaction; for this reason fitting should be performed by skilled technicians. Compatible with Marui-style V2/V3 gearboxes, the DL03 is produced entirely in Italy and suits both maintenance and performance upgrade scenarios for hobbyists and competitive players.

Concrete user benefits: improved power consistency in bursts, more reliable feeding during fast fire, robust component engineered for repeated use.

Technical features & specifications

Product type: tappet-plate / tappet rod delayer

Model: DL03 (Nikk Sakk design)

Material: loaded technopolymer (engineered for durability and timing precision)

Primary function: delay tappet-plate opening, postpone closure and increase BB positioning speed for rapid-fire scenarios

Compatibility: Marui-style / V2 & V3 gearboxes (broad compatibility with standard AEG platforms)

Manufacture: 100% Made in Italy

Installation note: requires modification of tappet rod fin; professional installation recommended

Package contents

1 FPS DELAYER DL03 (loaded technopolymer)

Warnings & maintenance

Do not tamper: do not grind, reshape or alter the delayer; unauthorised modifications can impair gearbox operation and create unsafe conditions.

Installation: gearbox disassembly and tappet fin modification are required—if unsure, use a qualified technician to avoid damage to gears, piston or tappet-plate.

Storage: keep dry and at stable temperatures; avoid exposure to chemicals or environments that degrade polymer components.

Testing safety: wear eye protection during installation and bench testing; perform low-rate tests to verify timing before operational use.

Keep out of reach of children: intended for technical use only.

Removable parts / maintenance: refrain from internal repairs unless qualified; after fitment inspect tappet fin and tappet-plate wear periodically and replace worn items with correct spares.
These warnings are written in clear language and comply with the GPSR Regulation and applicable Italian law.